Rice-hulling machine



` y derstooc lilatented dan.. 2d, lhdd.,

RICE-HULLIENG- MACHNE.

Application filed May 29, 1922. Serial No. 584,476.

To all' whom it may concern:

Be it known` thatl, YVILLIAM` `a citizen ot the United States, residing`at D. Cinner,

l-lllslooro.` in the county ot Highland and 5 State of (ihio.j haveinvented certain new and useiful lmproi'feinentsn Rice-llullinp)`Machines; and l do declare the following` to loe a full, clear, andexact description ot the invention, such vas will enalole "othersskilled in the art to which it appertains to .make and use the same.

This invention relates to an impr-ovedrice hailing` machine and one`object oli the invention is to provide ahulling inaehine which is soconstructed that when rice is passed through the machine practically allof the rice will he hulled and to further so constructv the machine thatrice passed through it will not he hrolien.

lt has been 'found th at with machines now in use, a great deal ot therice passes through the machine without heiughulled and thatffrointwenty-one to sixty-tive per cent ot the rice is broken, whereas withthis .machine2 ninety-live per cent oi the rieeis hulled and thebreakage only amounts to about three per cent.

Another object oil:

this invention is to so constraint this machine that the upper movablehoard may he adjusted sothat it can accommodate itself to grain which.are rela tively large or grain which are relatively sniall. Rice growsin different sizes and lov having` this upper board adjustable, it canbe readily set so that it will not have sutiicient pressure to loreal'the `grainlnit at the same time will have sulicicient pressure to causeproper hulling of the rice.

Another object ot' the invention is to provide these boards with groovedfaces so that as the boards inove longitudinally and the.

rice passes between them, the rice will loe moved transversely oit themachine :troni one side to the other andthus tho linlls removed in avery eliicient manner.

`Another object et the invention is to provide a machine which may he"huilt tor itanuly use and will he so` constructed that it may he veryeasily operated. it being; un-

l that the `operating means can he tor hand use or in a `larp-er machinehave suitable operatingl ineens adaptedto he powerV driven.

Another object ot the i' nvention to so construct this inachine that theflow of rice 'trom the hopper portion thereof into position tor passingbetween the upper and lower hullini;1 boards may loe controlled.

rlhis invention illustrated in the accompanying` drawings, wherein: y

llipu're l is a view showing the machine inside elevation. i

liiggnre 2 is a longitudinal sectional View throngh the inachine.

Figure 3 is a top plan view.

Figure 4e isa transverse sectional view talren along the line lf-4 ofFig. 2.

Figure 5 is view looking at theundei" rice-engagingiace of the upperboard.

Figure G is a top y. plan view of the machine with the upper hoardremoved and showing the tace of the lower board.

`'lhis improved hailing` machine` is provided with a traine havingsidewalls l loetween which is rigidly secured the lower hoard 2. thiitalolesupporting legs 3 are provided lor the trarne, the slniporting` legsheine arranged as shown in Figs. l and 2 so that lthe hoard 2 will bepositioned at an incline as shown thus causing; the rice to have a.teinleney to move downwardly along the hoard 2. The upper end portionot' this hoard is to provide a hopper portion upon which the rire to behulled will be placed and this hopper portion is provided with an endwall e and a forward wall 5H which extends between the side walls landadjustahly rnonntedso` that :it may be moved vertically. Byinoving thepartition or iront wall f5 ot the hopper portionand securing it in a setposition, the` amount of rice which passes beneath this partition canloe Controlled and thusthe speed at which the rice' is :ted to Vthehullinp; machine controlled. The lower or stationary helling board 2 hasits upper tace provided with grooves 6 which extend diagonally acrossthe board in crossed relation as shown clearly in Fig. l thus providinggrooves which will cause the rice to have a tendency to movetransversely oit the boards troni one side to the other as it nievesalong' the boards longitudinally. ,holsters 7 extend upwardly troni theupper edges of the side walls i and these holsters carry cross hars 8which in their `turn carry tophoard orhearinaj hoard 9 so that thishearing board which extends longitudinally of the machine will besupported in spaced relation above the lower hulling board 2. The endportions of this bearing` board 9 are cut away to provide fingerportions 10 through which the fasteners pass to secure this bearingboard to the supporting bars 8.

The upper hulling board 11 tits upon the lower hulling board 2 betweenthe side walls 1 of this machine and this upper or movable hulling boardhas its under tace provided with V-shaped grooves 12 which entendtransi'ferse'ly of the boa-rd as shown in Fig. 5. F rom an inspection ofthis Fig. 5, it will be seen that as the board moves longitudinally, thegrooves will have a tendency to move the grain transversely of the boardtowards the sides and towards the center thereof and will eo-operatewith the grooves 6 of the board 2 to thoroughly remove the hulls.It'shou'ld be further noted that the grooves 12 at one end ol the boardhave been omitted and the-board shaped to provide a V-shaped pocket 13so that the grains of rice may readily pass between the board 2 and theupper end ot' the movable board 11. This board 11 extends beneath thecross bars 8 and has its end portions engaged by rollers 14 carried byblocks 15. These blocks 15 are provided with threaded stems 16 whichextend upwardly through the cross bars 8 and carry winged nuts 17 sothat by adjusting` these nuts 17, the blocks 15 may be moved upwardlyagainst the action of springs 19 positioned about pins 19 between thethreaded stems 16. These springs 19 engage the cross bars 8 and blocks15 and will have a tendency to yieldably Ahold the upper h ulling boardagainst upward movement but at the same time will permit su'flicientmovement for proper hulling. By adjust-ing the winged nuts 17 the extentto which the pressure devices may move the board 11 towards the board 2may be controlled and therefore the boards can be prevented from beingheld close enough to the board 2 to cause breakage of large rice. Thisboard 11 is to have reciprocating movenient over the board 2 and willhave its movement limited by the partition 15 and also by means et anabutment 20 at the lower ends of the walls 1. In the presentillustration, the device is to be operated by hand and there hastheretore been provided an operating` lever 2l. which is pivetallyconnected with a block 22 carried by the board 11 and extends upwardlythrough a slot 23 formed in the bearing board 9. A pivot pin 24; extendsthrough the slot 23 and through a slot 25 which extends longitudinallyot the lever 2l so that by rocking the lever longitudinal reciprocatingmovement can be imparted to the upper hulling board 11. The provisionoir the slot- 25 permits the lever to move upwaii'dly through the slot23 when the winged nuts 17 are turned to vertically adjust the pressuredevices. lVhile the machine has been shown provided with a lever 21 :lorhand operation oit the device, it is to be understood that this is onlyone means which may be employed ior imparting reciprocating movement tothe upper helling board l1 and that any suitable means may be provided,the said means being either hand-operated or power driven according tothe size of machine built. i

lhen this machine is in use, the riec which is to be hulled is placeduponv the hopper forming portion ot the lower stationary hulling board 2and since the machine is tilted as shown in Figs. l and 2, the rice willhave a tendency to par-ss beneath the partition 5 which will be set tocontrol the speed at which the rice passes 'trom the hopper portion ofthe machine. This rice passes between the board 2 and the upper endportion ot the board 11 and as the ripper movable luilling' boardrrailnocates. the rice will be moved transversely ot the board and willgradually work down the lower board from the upper end to the lower end.As the, grains ot rice move alongr the lower stationary hulling board,the hulls will be removed in a very e'llicient .manner but the grains ofrice will not be broken duc to the 'lact that the upper board can be setthe proper distance for thorough hullingr without excessive pressurebeing applied to the grains oi rice. There has thus been provided ahulling machine so coi'istructed that thc rice can be caused to passbetween Jthe two boards-1 in a very ellicient manner Vfor thoroughhullinp.r and there has lurther been provided a niachine in which thepressure upon the upper board. can be controlled to prevent breakage.The elements 2 and Yll have been termed hulling boards but it is to beunderstood that. these as well as the rest ol the machine may be formedoit wood. metal or any other suitable material.

l claim:

1. A rice hulliug` machine comprising a structure including a lowerhulling board having `grooves e..\.:tcmling` diagonally across its uppertace and in crossed relation, and an upper huliinfielement positionedabove the lower hulline` element and movable longitudinally thereof' andhaving its under tace provided with `grooves extending diagonally tronithe sides and convergingv it the. center.

-li rice hulling machine includingr a lower hullino; board and an upperhulling board movable longitudinally oit the lower hulling board. thelower hoard having its upper tace provided with grooves extendingdiagonally 'from one side to the other and in crossed relation. theupper hulling board havingl its under face infovided with groovesextending diagonally troni the sides and meeting at the center, meansfor impartll (l lill) lframe .including a lower hulling board, crossbars extending above the lower hulling board and having openings, anupper hulling board upon the lower hulling board, pressure means for theupper board operatively associated with the cross bars and eachincluding a carriage element including rollers for engaging the upperhulling board and stems extending through the openings in the crossbars, guide pins extending upwardly from the carriages,

springs about the guide1 pins having their upper ends engaging the crossbars and yieldably holding the carriages against upward movement withthe rollers in engagement with the upper board, and securing nutscarried by the upper ends ot said stems and engaging the cross bars forpermitting adjustment to control movement of the carriages towards theupper hulling board and control pressure exerted against the upperhulling board. a

5. A rice hulling machine comprising a iframe including side walls and alower hulling board between the side walls, cross bars extending fromone wall to the other and having openings between the walls, an upperhulling board upon the lower hulling board,

' pressure means for the upper board operatively associated with saidcross bars and each including a carriage element including rollers forengaging the upper hulling board and stems extending through theopenings in the cross bars, a guide pin intermediate the stems, a springabout the guide pin having its upper end engaging the cross bar andyieldably holding the rollers in engagement with the upper board, andsecuring nuts carried by the upper endsof said stems and engaging thecross bars 'tor permitting adjustment to control pressure exertedagainst the upper hulling board.

6. The structure of claim 5 and a bearing strip carried by said crossbars and extending longitudinally of the upper board and having alongitudinally extending slot between the cross bars, a lever pivotallyconnected with the upper hulling board and extending through the slot ofthe bearing strip, and a pivot pin passing through the slots of thebearing strip and lever handle.

7. A rice hulling machine comprising a frame including side walls and alower hulling board between the `side walls, the hulling board beingpitched at an incline, an upper end wall extending between the sidewalls at the upper end or' said hulling board, a partition extendingbetween the side walls and adjustable towards and away from the hullingboard to permit passage of material beneath the partition to becontrolled, the hulling board between said partition and the lower endof the board being provided with grooves extending diagonally of theboard in crossed relation, an upper hulling board upon the lower hullingboard having its undei-face provided with diagonally extending groovesconverging at the center of the board, means for imparting reciprocatingmovement to the upper hulling board longi tudinally of the lower board,and pressure means for yieldably holding the upper board in engagementwith the lower board.

8. A. rice hulling machine comprising a frame including side walls and alower hulling board between the side walls, an upper wall forming stripat the upper end of the lnilling board, a partition extending betweenthe side walls in spaced relation to the upper ends thereof andtogether' with the upper wall and upper end portions of the side wallsand lower hulling board forming a hopper, said partition beingadjustable towards and away from the hulling board to permit rice topass from the hopper beneath the partition at a desired speed, an upperhulling board resting upon the lower board between the partition and thelower end of the lower hulling board, means for imparting movement tothe upper hulling board, and means for yieldably holding the upper boardin engagement with the lower board.

In testimony whereof l have hereunto set my hand.

WLLIAM l). CHANEY.

